For example, the purchase price of Shanghai Copper 100 1 is 4 1800, which is a price of one ton and five tons, so at least the price of (4 1800*5) is needed, but a deposit is also needed, that is, at least (41800 * 5) must be in the account. It is still very expensive for most ordinary people, so it is suggested to start with agricultural products, which are cheaper than metals.